Machine for casting chocolate



Oct. 11 1927. 1,645,505

J. J. JENSEN' MACHINE FOR CASTING CHOCOLATE Filed 001.12. 1925 5 Sheets-Sheet 1 Oct. 11 1927. 1,645,505

J. J. JENSEN MACHINE FOR CASTING CHOCOLATE Filed Oct. 12. 1926 5' Sheets-Sheet 2 [Mr J96 W J JJnsen Oct. 11 1927.

J. J. JENSEN MACHINE FOR CASTING CHOCOLATE Filed Oct. 12. 1926 5 She ets-Sheet s a LI JTJense r;

Oct. 11 ,1927.

J. J. JENSEN MACHINE FOR CASTING CHOCOLATE Filed Oct. 12, 1926 5 Sheets-Sheet 4 J JTJerwen 0000 00 00 0000 0000 0000 00 00 OH 08 fiUfiU UOU 0U Unwu Oct. 11 1927. 1,645,505

J. J- JENSEN MACHINE FOR CASTING CHOCOLATE Filed Oct.12. 1926 5 Sheets-Sheet 5 llllllllllll IIIHIIIIIIH IHHIIHI llll Illlllll lllllllfifll J. j. Je nszn Patented Oct, 11, 1927.

UNITED. STATES :HPATENT OFFICE.

- inns commas JENSEN, or COPENHAGEN, DENMARK, assreii'on T0 BGGILD a JACOBSEN, OF COPENHAGEN, DENMARK.

MACHINE FOR CASTING CHOCOLATE.

Application filed October 12, 1926, Serial No. 141,215, and in Germany February 24, 1926.

The presently used machines for continuous casting of chocolate are Subject to .the drawback that a readjustment from one kind to another kind requiresconsiderable mechamcal changes, which consume much time.

These machines are therefore not very practical and have been emplo ed only at very large factories, where read ustment has not to be performed too often.

The present invention has for its object to render practicable the casting, in the same machine and only by a simple and quickly effected readjustment, of all different merchantable forms of solid chocolate ranging from chocolate pastilles, Napolitains etc. up to larger tablets, such as cakes of cooking chocolate, the manual operation being reduced to filling the casting hopper and removing the finished chocolates. The principal distinguishing feature of the invention consists partly in an arrangement-of theattachment of the mould plates to the. com

veyor belt, whereby the said mould plates may easily be exchanged, and partly in spe.' cial devices servingto operate intermittently the feeding pumps by means of which the chocolate mass maybe squirted into the cav i ties of the mould, in such a manner that this intermittent motion may easily be read justed not ay according to the numberv of moulds in the same row on the same mould plate, but also according to the spaces between the mould plates. Mechanical devices are further providedto function so that the surface of the chocolate,,mass in the moulds may be plane and smooth, and finally devices are provided serving to remove the chocolates automatically from the machine after cooling. a

The invention is illustrated in the accom panying drawings, wherein Fig. 1 is a diagrammatic representation of the entire machine, partly in vertical longitudinal section,

Fig. 2 is a top view of the machine, 7

Fig. 3 illustrates a mould-plate holder,

Fig. 4 is a section along the line IV-IV in Fig. 3, I

Fig. 5 is a longitudinal section of the mould holder along the line VV in Fig. 3 but with the mould plate-inserted,

Fig. 6 shows the feeding hopper with the feeding pumps, in side elevation,

Fig. is a top view of the hopper with the transmlssion members belonging thereto,

, Flg. 8 is a vertical section of the feeding lgpppgr proper'along the line VIIIVIII in Fig. 9 shows the transmission members for the valve mechanism of the pumps, I v r Fig. 10 shows the transmission members for thefeeding hopper proper,

Fig. 11 is a diagram showing the oscillations of the feeding hopper, I r i Fig. 12 shows a mouldplate with two different divisions,

.Fig. 13 shows a gearing device adapte to modify the number of pourings of the fee-ding hopper relatively to the motion of the conveyor belt, the figure showings. horizontal partial section of the mechanism,

Fig. 14: shows, in side elevation, the device driving the. vibratory rails.

The machine consists mainly of an endless conveyor belt 1 on to which the moulds are This conveyor belt is moved past a ,feeder mechanism A, where themoulds are filled with chocolate. Thence the filled moulds are passed along a pair of vibrating rails 13 to a cooling chamber C, after passing through with a stirring worm A that is moved from themain shaft 9, Fig. 7 by means of a chain 'drive 91, 92, 9 3, the sprocket 93 being fixed on a shaft 7 withflbevel pinion (too-operating disposed above the upper edgejef thehopper,

and to which the stirring worm 4 is attached. The connection betw-een the toothed rim 5 and the-worm. 4-fiis of such a nature that toothed ri and lifted upward. This arthe worm I ay easily be detached from the rangementaiowever, does not form part of the present invention.- The lower end, of

the hopper communicates with a bottom block or piece 10,'and the latter has in its 75 attached in the manner hereinafter described.

95 with a toothed rim 5, which horizontally lower portion a number of pump cylinders 11 containing a corresponding number of pump pistons 12 and a rotary valve mechanism 13. The pistons 12 Fig. 8 are moved by means of a lever device 14, 15 and 16, the outer end of the lever 16 being pivoted to a sliding block adapted to travel in a slot 17 and to be displaced in the same by means of a screw-spindle 19 fitted with hand-wheel 18. The slot is arranged in an arm 20 which is firmlyconnected to another arm 21. The said arms are pivoted about a pin 22. The

- outer end of the arm 21 is forked and fitted with running rolls 23 co-operating with a cam disc 24 on the shaft 7 The pin 22 as well as a pin 25 about which the bell-crank lever 14, 15 is pivoted, are situated on the outside of the hopper 3, and consequently they partake in the oscillating motion of the same as hereinafter described. By the arrangement described, the cam disc 24, Fig. 8, when rotating, will cause the pistons l2 to be pushed back and forth in the pump cylinder 11, and even during the operation the length of stroke of the pistons may be varied by turning of the hand-wheel 18.

Between the cylinders 11 and discharge channels 26 of the bottom piece 10, there is inserted a cylinder valve 13 which is moved by means of a lever arm 27, Fig. 9, hinged to a connecting rod 28, the upper end of which is pivoted to an arm 30, Fig. 9 keyed to a shaft 29. To the same shaft in ere is attached another arm 31, the fork-shaped end of which co-operates with a cam disc 88 provided on a shaft 82.

The bottom block or piece 10 containing the pump cylinders 11, the pump pistons 12 and the rotary valve 13 as shown 1n Fig. 8 is detachable from thehopper ,3, and may therefore easily be exchanged. Each bottom block contains a certain numberof pumps and corresponding valves, depending upon the number-of moulds in each row and the size of the moulds. I

While the conveyor belt 1 is moving uniformly, the feeding hopper 3, Fig. 10, with the pumps and valve belonging thereto perform an oscillatory motion, chocolate mass being delivered by the pumps, by way of the valve, into the moulds of the mould plates during the oscillation of the feeding hopper.

-As there may be a different number of moulds in the mould plates, and as the distance between the last row of moulds in one mould plate and the first row of forms in the following mould plate as a rule will be larger than the distance between the rows of moulds in the individual mould plate, special means must be provided, to equalize the difierence in these distances. in Fig. 12 are shown some'mould plates in top view. In the right hand half of the mould plates, round moulds are shown for castingof chocolate pastilles, and in the left hand half of nascent the mould plates oblong moulds are shown for casting of cats tongues. This arrangement is here shown merely by way of illustration, butin practice-all the moulds in the same plate must of course be spaced similarly. It is evident that if pastilles are ments of the hopper must be slower than that of the conveyor belt during the pouring period, in order that chocolate mass poured may be dragged along the entire length of the recess. In order to utilize the mould plates as much as possible, the moulds are spaced as closely to each other as possible, and it will therefore be understood that the oscillation of the hopper must be able to be varied so as to correspond to the number of mould rows in the same mould plate as Well as to the length of the individual moulds and, finally, So as to equalize the above mentioned differences in the distances between the rows of moulds.

On the main shaft 9 there is provided a sprocket wheel 34, Fig. 6, connected by means Qf a chain 35 to a sprocket wheel 36 on a shaft 37 which is journalled in the frame of the machine. On the said shaft 37 there is fixed a pinion 38 cooperating with a spur wheel 39 on a shaft 40 similarly journalled in the frame and supporting a cam disc 41, Figs. 6 and 10, which co-operate with a bell-crank lever 43, 44 pivoted about a pin 42 the lever is normally held against the cam disk in any convenient manner as by a spring (not shown), the other arm 44 of the said lever being hinged to a connecting rod 45, the upper end of which. is fitted with a wedge 46 which oncecount ofthe rotation of the cam disc 41. will move up and down between a fixed guiding roll 47 attached to the bottom block and an other guiding roll 48 provided at the end of a. double-armed lever 49, 50 which is pivoted about a shaft 51 in the frame. The

casting position, concerning which it should be noted that the discharge openings of the pumps are directed downward relatively to the recesses ofthe moulds. is adjusted by means of a nut 52 for a screw spindle 53 with hand-wheel 54. Fig. 10, provided at the end of the arm 50. The outer end of the said spindle 53 is threaded with threads of the opposite direction, and pa ses through another nut 55 in a lever 56, which is pivotcd about the shaft 51. The outer end 57 of the lever 56 supports a roll 58 co-operating with one out of a number of cam discs 59, 59; 59, 59. Fig. 7. By the rotation of these cams, the roll 48 will be set into an oscillating motion about the shaft lUU mitted to the hopper 3 by way of the wedge,

46 and the roll 47.

The above mentioned cam discs 59*, 59

' 59 and 59 are similarly used in order to be able to vary the oscillation of the hopper 3.

The roll 58, Figs. 7 and 10, is adapted to slide on a shaft 60, in such a manner that the deflection of the ho per 3 will vary according to the shape 0 the one of the said cam discs 59, 59", etc. with which it has been adjusted to co-operate. By reason of this mechanism it becomes practicable to vary the length of mould covered by a poured round drop, and to cause it to assume an oblong shape, for instance in case of cats tongues or a round shape in case of pastilles, etc.

In order to be able to vary the number of castings for each mould plate, on which as mentioned above there may be one, two, three up to five or six rows of moulds, there is provided a variable speed transmission device consisting of various co-operating gear wheels. This gear mechanism is shown in Fig. 13, and consists of a casing 68 in which there is journalled the main shaft 9 driven directly from a source of power by means of a belt and belt pulley 69, there being keyed on to the said shaft inside of the casing 68, a number of gear Wheels, four in all on'tlie embodiment here shown. On another shaft 71 there are provided four loose gear wheels 72, 73, 74, 75, co-ope'rat ing with the first mentioned fixed gear wheels 76, 77, 78 and 79. The loose gear wheels are separated, two and two, from one another by means of coupling discs 80' and 81 adapted to slide on the shaft 71. According to circumstances the two coupling discs 80 and 81 may be connected alternately to one or the other one of the gear wheels 72, 73, or 74, 75, as the case may be, by

' means of the rods 95 and 96, which are pivoted about the pins 97 and 98, and the fork-shaped ends of which are fitted with pins 101 and 102 resting in grooves n the coupling discs 80 and 81.

In the position shown in Fig. 13, the disc 80 is clutched on to the gear wheel 72, in such a manner that the shaft 71 will receive a rotation relatively to the shaft 9 and determined by the number of teeth on the gear wheels 76 and '72. The herein described arrangement is, made in order to secure not only the number of castings on eachmould plate, but also to make sure that the cast ings will be effected at the proper point in the moulds, the shaft 71 being connected directly to pump pistons .12 by way of the gear wheel 70, Figs. 6 and 13, which is mounted on the shaft 32, Fig. 6, this gear wheel is in direct engagement with a gear wheel 83 loose on the shaft 7 but rigidly connected to cam 24 as by a sleeve carried on the shaft 7 as shown best in Fig.

7, from which shaft the pump pistons, as mentioned above, receive their motion.

As mentioned above, the mould belt is continuous, and travels uniformly. It consists of two chains, shown in section on Fig. 5, where the chain links are marked 61. A number of these chain links 61 are firmly connected to a plate 62, with bent edges, see Figs. 3, 4 and 5, the top portion of the said plate forming holding edges 63 between which the mould plate 64 proper may .be

pushed and held in position against a fixed' stop 94 by means of a plate spring 65, the hook-shaped end of which is adapted to engage the rear side of a moulding at the end of plate 64. The individual mould plate is fitted with recesses corresponding to the shape of the chocolates to be cast.

It will be understood that the exchange of these moulds in the mould holder may easil be eflected,.so that the mould belt of the machine may easily be adjusted from one chocolate mould'to another one, simply by pulling the mould plates 64 out from the holder edges 63 and pushing other mould plates into position instead.

When the operation of the machine is to be described, it may be supposed at first that the machine is to be used for casting chocolate pastilles, and the mould plates 64 are all filled with moulds 84 of the kind shown in the right hand half of Fig. 12. In the moved conveyor belt, the feeding hopper 3 while performing the pouring must have the same oscillatory speed as the moving conveyor belt, as only a round drop is to be lpoured. This adjustment of the feeding opper is effected by moving the roller 58, Fig. 7, so far on the shaft 60 that the said roller comes into engagement with the cam discs 59*, 59", 59, '59 which owing to its, shape imparts to the feeding hopper an oscillation corresponding exactly to the speed of. the conveyor belt. This oscillating motion is effected by means of the disc concerned 59", 59, 59, 59, Figs. 6' and 10, actuating during its. rotgtion the system of levers 56, 50, 49, in such a manner that the arm 49, Fig. 10, will swing back and forth at exactly the desired speed. The end of the rod 49 supports as above described a roller 48 pressing against the wedge, 46, which in its turn presses against a roller 47 provided on the bottom piece of the feeding hopper. Thereby the desired motion is imparted to the hopper,'and in order to secure the pouring orifices coming exactly above the mould 84 during pouring, the gearing mechanism, Fig. 13, is adjusted exactly 1n such a manner that this will be the case. If for some reason or other the mould might get an oblique or faulty position, the latter may be adjusted nicely by turning the threaded spindle 53, Fig. 10, by means of the hand-wheel 54. Normally the division of the period of oscillation is calculated for instance from the first row of moulds in the one mould plate 64 to the corresponding first row in the following mould plate 64, but the said division, being four in the present case. cannot be uniform, the reason be: ing that there is another space between the last row of moulds 84 in one. mould plate 64 and the fint row of moulds 84 in the following mould plate 64 other than the space between the rows of moulds in the same mould plate, and in order to equalize this difference a variation of oscillations is imparted to the feeding hopper by means of the wedge 46, Figs. 6 and 10, the said wedge, as described above, being slowly pulled downward owing to the motion of the cam disc 41, until the latter when a mould plate is passed by, has made one full rotation and, thereby, has caused the wedge 46 to be lifted up. In other words, for the passage of each mould plate below the feeding hopper, the wedge 46 is moved uniformly and slowly downward, and while the space between two mould plates passcs'the pouring orifices, the wedge is quickly moved upward to the initial position shown in Fig. 10.

The manner of action of this wedge will appear from the following:

Supposing the first row of moulds 84 in the mould plate 64 to have been filled, then the hopper 3 will be swung to the right, as shown in Fig. 10, and during the pouring operation it will swing towards the left following the motions of the mould belt. As now the mould belt has travelled forward one fourthof the distance between the two front rows of moulds in two consecutive mould plates, while the distance between the first and second row of moulds in the same mould plate is smaller than this distance, the feeding hopper 3 will have-to perform its next oscillation to the left, beginning further to the left a distance corresponding to the above described space. This is graphically illustrated in Fig; 11, where the oscillation of the feeding'l opper between the first and second row is marked I,.while the oscillation subsequent passage of the space between two consecutive mould plates, the wedge 46 moves upward again, as described, in order then to'repeat the working process for each mould plate. a

The above described casting of pastilles must evidently be modified, as soon as the question is to cast oblongbodies, for instance cats tongues. The corresponding moulds are marked 85, Fig. 12, and the number of rows of these moulds may evidently be smaller. On the mould plates drawn in Fig. 12, two rows are shown. Here too the wedge 46 must perform the function of equalizing the variations of distance, but the very length of the pourings must now also be varied, as well as the number of pourings on each mould plate. These requirements are met by retarding the angular velocity of the feeding hopper 3 insuch a manner that during pouring the oscillation of the hopper will be slower than the motion of the conveyor belt. Thexe adjustments are effected in the following manner:

As only two pourings are now to be made on to each mould plate, instead of four as heretofore described, the gear wheels 72, 73, 74 and 7 5 are readjusted in such a manner that another one of these is coupled to one of the discs 80 or 81, whereby the pump pistons will be caused to make another number of strokes, in the present case two for each mould plate,the strokes being performed as described above by the system of levers 21, 19,16, 15, 14 actuated by the cam disc 24.

In order that the pouring may be lengthened, in such a manner that the oblong moulds will become filled, the feeding hopper 3 as mentioned must not follow the velocity of the conveyor belt as before, but must swing more slowly, and this is effected by allowing the roller 58 to co-operate with the corresponding cam disc 59, 59 59, 59, which in the above described manner will then impart to the feeding pumps the angular motion now corresponding to the motion of the conveyor belt.

The pumps move forward and backward at the same speed, and therefore when the hopper is standing still, and the mould belt is moving uniformly, the length of the pourings and the length of the spaces wi l be equal. When casting cats tongues, plates etc. the length of the castings, however, will frequently be considerably longer than the space between the castings, and the oscillation of the feeding hopper 3 must therefore be very slight, and it may even happen that it has to be at a standstill during the pourings. or, in case of very long castings, that it gets a retrograte motion relatively to the direction of motion of the mould belt. Here Loo the variations-of distances between the,

After the moulds have been filled by passing the above described feeding mechamsm A, Fig. 1, they are moved along a pair of vibratmg rails B, Fig. 14, each of which is moved by an eccentric 86 on a transverse shaft -87 These eccentrics co-operate with vertical rods 88 joined by means of abolt 89, which ismoved up and down by the eccentrics and, thereby, shake. the two guidin rails 90 of the conveyor'chains, the said ralls in their turn transmitting the vibration to the moulds. Thence the moulds travel further on with the conveyor chain through the cooling closet C, until the moulds, top side down, arrive at another conveyor D, where the chocolates produced drop out p of the moulds and down on to the conveyor, the moulds being ta ped in otherwise known manner. From here 'the conveyor chain travels backto the feeding mechanism A, Fig. 1, passing on their way a heating closet E, in such a manner. that the moulds, when they arrive below the feeding hopper, have a temperature corresponding essentially to that of the chocolate mass.

Having now described my invent1on,;what I claim as .new and desireto secure by Let ters- Patent is'z- 1. In a machine for casting chocolate, an

oscillatable hopper, oscillating means therefor, a pump attached to the hopper, a mold plate with molds therein,said mold plate being movable at a uniform speed below the pump, and means for adjusting the length of oscillations of the hopper.

2. A machine for casting chocolate'as set forth in claim 1 wherein the hopper has a bottom piece detachable therefrom which sustains the pump connected to the hopper. 4 3. A machine for casting chocolate as set forth in claim 1 in which there is a bottom piece. below the hopper containing a plurality of pump cylinders and pistons with means to operate the pistons to discharge the material from the hopper.

4. In a machine for casting chocolate as set forth in claim 1, in which the oscillating means for the hopper may be varied to correspond to the number of rows in each mold plate aswell as the length of the individual molds.

5. A machine for casting chocolate as Set forth in claim 1 in which the oscillating 6. In a machine for casting chocolate as set forth in claim 1, means to' 'equalize thd difference in the distance between the rows, of molds, said means consisting of a cam disc moved synchronously with the conveyor belt levers, and a wedge moved by the levers between a fixed stop and a roller to varythe oscillations of the hopper.

7. A' macnme for casting chocolate as set forth in claim 1, including a variable speed gear for operating the pump pistons at different rates of speed to correspond to the number of molds in each mold plate.

8. A machine for casting chocolate as set forth in claim 1, in which the mold plates are fixed to the molds by springs 65 and stops 94.

9. A machine for casting chocolates, comprising a hopper for holdingthe chocolate said hopper being oscillatable on a horizontal pivot, a uniformly movable conveyor with chocolate molds thereon beneath the hopper,

means to regulate the flow of chocolate from the hopper and means for periodically moving the discharge portion ofthe hopper in correspondence with that of the conveyor.

In testimon whereof I aflix my signature.

' JE S J OHANNES JENSEN. 

